Вопрос школьника по предмету Геометрия
В правильной четырехугольной пирамиде , боковое ребро равно 6 и наклонно к плоскости основания под углом 60 градусов. Найти высоту пирамиду.
Ответ учителя по предмету Геометрия
Пусть SABCD — данная пирамида. АС диагональ основания и SO- высота, AS=6. <SAO=60. Треугольник ASO прямоугольный. Тогда SO=AS*Sin<SAO=6*корень из 3/2
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Interviewer: So why (1) did you apply / have you applied for this position?
David: Well, (2) for / since the last three years I have been working in an interesting, but very small, company, and I now feel ready to move on to a bigger challenge.
Interviewer: Right. And can you describe what your responsibilities are at your current company, at Intertech?
David: Of course. Well, I (3) started / have started working there three years (4) since / ago , as I (5) said / have said, and until July 2013 I (6) was / have been responsible for the online catalogue. However, I was then promoted and put in charge of the design and maintenance of the entire website. In January 2014, I (7) have helped / helped to implement a new e-commerce system, which allows people to buy directly from the catalogue using ‘one-click’ ordering. It (8) was / has been very successful so far.
Interviewer: That’s very impressive. What about foreign languages? Your English is obviously very good, but do you speak any other languages?
David: Well, French – my mother tongue – obviously. I also (9) spent / have spent some time in Spain five years (10) since / ago as part of my degree, so I’d say I have intermediate Spanish. Interviewer: OK, just one more thing. (11) Did you / Have you ever had experience of people management?
David: Yes, absolutely. At Intertech I’m in charge of one member of staff – a web editor. I’ve never had any problems with the management side of my role; in fact, I really enjoy it.
Interview: OK, well that’s good news. Well, we need to have a think about it, but we’ll let you know ASAP.
David: Thank you for seeing me today. I look forward to hearing from you soon.